Tackle block



' w. WRIGHT 1,713,587

TACKLE BLOCK May 21, 1929.

Filed Aug. l, 1927 INVENToR V///Om M/rl' ht' BY ATTORNEY Vlo PatentedMay 21, 1929.

UNITED STATES PATENT OFF 1,713,581 Ica.

WILLIAM WRIGHT, F TULSA, OKLAHOMA, ASSIGNOR- TO OKLAHOMA IRON WORKS,

OF TULSA, OKLAHOMA, A CORPORATION OF OKLAHOMA.

nexta nLoex.

Application med August 1, 1927. serial no. 209,192.

My invention relates to tackle blocks and more particularly to a deviceof that character for hoisting heavy loads with av multiplication ofpower, as 1n oil well drilling or the like, and has for its principalobject t0 provide a secure, compact arrangement of the tackle elementswith elimination of such projecting parts as might engage a derrick orother equipment with damage to the same or to the block. Y

It is also an object of the invention to provide a. block of thischaracter wherein the shackle and axle pins are non-rotative to preventwear on the body plates, but adjustable to extend the lives of pins wornby the sheaves or clevises.

In accomplishing these objects I have provided improved details ofstructure, the preferred forms of which are illustrated in theaccompanying drawings, wherein:

Fig. l is a perspective View of a. tackle block embodying myimprovements.

Fig. 2 is a central, longitudinal section of the same.

A block embodying my invention includes the usual body plates 1 of anumber dependent on the number of sheaves employed; the blockillustrated in the present drawings including four body plates forcarrying three rope sheave wheels 2; the body plates being spaced toprovide free rotation of the sheaves by suitable rollers or otherspacers, carried by tie pins 3 at the ends of the block. Here Iillustrate the spacers for the outside and next inner plates asconstituting the oyes 4 of shackle clevises 5, whereby the block issuspended from a rope or other support and whereby a tool or otherarticle is suspended from the block. The inner' body plates are spacedfrom each other by rollers 6, preferably having concave rope grooves forguiding ropes or cables used in connection with the block. v

Extending through the transverse Vcenter of the block is an axle pin 7carrying the sheave wheels in the usual manner.

Blocks of this character are usually held in assembled relation by nutson the ends of the pins, engaging the outer faces of the outer bodyplates. With such construction, however, there is danger of theprojecting ends of the pins, or the nuts on the pins, engaging under apart of the derrick, or equipment in the derrick, and damaging thederrick equipment or block, and the end pins being rotatable permitexcessive wear on the plates.

To obviate vthe disadvantages mentioned and permit quick assembly of theblock, I provide shackle and axle pins of a length to project butslightly beyond the outer frame plates and havin transverse key grooves8 in their outer en y sformin retaining li s 9 of suflicient strength toold the loc 'ng keys. Each of the shackle pins4 hasrbut a single grooveat each end, but the axle pin has two grooves at each end facingoppositely so that the groove at one side may cooperate with the groovein the pin in the end of the block at that side of the axle pin and thegroove in the opposite side of the axle pin may co-operate with the`roove in the shackle pin at the other end o theblock.

Fitting over the ends of the pins are reinforcing bars 10 and lyingagainst the outer faces of the reinforcing bars are key bars 11, eachwith its outer end seated in an inwardly facing groove in a shackle pinand its inner end seated in a mating groove in the axle pin.

With the ends of the pins at opposite sides of the block keyed asdescribed, the plates are heldin assembled relation but spaced by theshackle eyes and rollers to provide free rotation of the sheave wheels.

The key bars may be attached to the frame by screws 12 which projectthrou h the key bars and reinforcing bars into t e outside frame plates.

A tackle block constructed as described may be easily and quicklyassembled and is adapted for use in accordance with common practice,except that sway of the block causes pivotal action of the clevis eyeson the end pins as distin uished from rotation of the pins in theplates, thereby od avoiding wear on the bod'y plates incident to thrustof the pin heads and nuts against the plates with blocks of previousconstruci tions. Should the axle pin Wear on its upper face, due to therotation of the sheaves under weight of the/load, the pin ma be removed`and reversed, providingv a esh rounded surface to the sheave wheelbushings and in this way doubling the life of the pin.

It is apparent, therefore, that I have pro- "ided a tackle block whichmay not only be easily and quickly assembled but one wherein the partsare reversible and, to

tended beyond the traine plates and having' transverse grooves tacingthe grooves in the sheave pin, bars attached to the Jframe plates,eachhaving its ends seated in'liacing grooves in fthe sheave pin andshackle pin,

a sheave Wheel on the sheave pin and shackles onthe shackle pins. Y

'2. A tackle blockv including spaced l une plates, a sheavefpin havingend 'poitions extended beyond the traine plates and provided Withopynisitelyr racing transverse grooves, shackle pins having portionsei;- tended beyond the traine plates and having transverse groovesfacing the grooves in the sheave pin, Vbars attached to the traineplates, each lhaving its ends seated in facing groovesv in the sheavepin and shackle pin, a Vsheavevvheel on the sheave lpin and shackles onthe shackle pins, the sheave pin being reversible in its Inounting'andin locked rela- ,ser

tion to the shackle pins, fort-he purpose set orth. i Y

3'. A tackle block including frame plates, lshackle and sheave pinscarried by said plates and having transverse grooves, and

key bars iXed to theJ traine plates and seated in the pin grooves toVanchor the pins and space the traine plates.

' l. 'fr tackle block including apertured traine platesfshackle andsheave pins eX- tended through the apertures in said frame plates and.having transverse grooves in their outer ends, and key bars fixed to theouter 'faces ot the traine plates and extended into the pin grooves toremovably anchor the pins to the plates and removably anchor the platesin spaced relation on the pins.

Y 5. rlhe coinlnnation inl a tackle block of apertnred 'traine plates, asheave pin extending through the apertures in said plates and havingouter ends exposed beyond the outer haces ot the plates, said projectingends having transverse grooves and Ykey bars iXedV to the outer faces ofthe frameplates and seated in the pin grooves to anchor the pin to theplates and space the platesfon the pin.

ln testimony whereof I alhx Iny signature.

WILLIAM WRIGHT.

